Sawi (Thai: สวี, pronounced [sā.wǐː]) is a district (amphoe) in the central part of Chumphon province, southern Thailand.

Neighboring districts are (from the south clockwise) Thung Tako and Lang Suan of Chumphon Province, La-un and Kra Buri of Ranong province and Mueang Chumphon of Chumphon Province.

On 16 April 1897 a first district office was opened in village five of tambon Na Pho.

After several relocations, the present office in village four of tambon Sawi was opened on 1 October 2001.

The district is divided into 11 sub-districts (tambons), which are further subdivided into 114 villages (mubans).